#39961 [Opn->Bgs]: fread() trouble with stream wrappers
ID: 39961
Updated by: tony2001@php.net
Reported By: php_nospam at ramihyn dot sytes dot net
-Status: Open
+Status: Bogus
Bug Type: Streams related
Operating System: Win32,Linux x86
PHP Version: 5.2.0
New Comment:
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to
report
a bug at http://bugs.php.net/how-to-report.php
http://php.net/fread
Previous Comments:
------------------------------------------------------------------------
[2006-12-27 11:24:42] php_nospam at ramihyn dot sytes dot net
Description:
------------
PHP's fread() function reads only the first 8192 bytes of any file
accessed via a stream wrapper, even if the file is bigger and the
wrappers' stream_eof() method returns false to signal it is NOT the end
of the file.
I expect fread() to repeat calling the wrappers' stream_read() and
stream_eof() methods until stream_eof() signals the end of file or
stream_read() returns less than the requested 8192 bytes.
I encountered this behaviour with PHP 5.2.0 on Win32 and Linux x86.
Reproduce code:
---------------
<?
class PHP_Bug {
private $data; private $pos;
function initializeStream()
{
$this->data = str_repeat("-",16399);
$this->pos = 0;
}
function stream_open($fn)
{
$this->initializeStream();
return true;
}
function stream_stat()
{
$this->initializeStream();
return
array(0,0,0100444,"mode"=>0100444,"size"=>strlen($this->data));
}
function url_stat()
{
return $this->stream_stat();
}
function stream_read($cnt)
{
echo __METHOD__."(".$cnt.")\n";
$ret = substr($this->data,$this->pos,$cnt);
$this->pos += strlen($ret);
return $ret;
}
function stream_eof()
{
$ret = ($this->pos >= strlen($this->data));
echo __METHOD__."=".(($ret)?"true":"false")."\n";
return $ret;
}
}
stream_wrapper_register("bug","PHP_Bug");
$fs = filesize("bug://");
$fp = fopen("bug://","r");
$ret = fread($fp,$fs);
fclose($fp);
echo "size is ".strlen($ret)."\n";
?>
Expected result:
----------------
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=true
size is 16399
Actual result:
--------------
PHP_Bug::stream_read(8192)
PHP_Bug::stream_eof=false
size is 8192
------------------------------------------------------------------------
--
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Thread (5 messages)